Segment Information - Schedule of Financial Performance of Reportable Segments (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Mar. 31, 2013
Jun. 30, 2014
Jun. 30, 2013
Segment Reporting Information [Line Items]          
Insurance revenues $ 72,168,000 $ 73,961,000 [1]   $ 142,753,000 $ 152,725,000 [1]
Net investment income 41,351,000 42,878,000   82,042,000 85,288,000
Benefits and expenses 104,055,000 104,858,000 [1]   211,203,000 221,038,000 [1]
Net income (loss) 8,457,000 10,851,000   13,959,000 16,039,000
Reconciling amounts related to immaterial corrections of errors   8,400,000 15,700,000    
Individual Segment
         
Segment Reporting Information [Line Items]          
Insurance revenues 39,100,000 42,805,000 [1]   76,991,000 91,052,000 [1]
Net investment income 38,410,000 39,801,000   76,056,000 79,170,000
Benefits and expenses 69,621,000 72,742,000 [1]   140,327,000 155,758,000 [1]
Net income (loss) 7,394,000 9,465,000   13,153,000 14,394,000
Group Segment
         
Segment Reporting Information [Line Items]          
Insurance revenues 14,379,000 13,025,000   28,627,000 25,551,000
Net investment income 135,000 118,000   260,000 249,000
Benefits and expenses 14,415,000 12,629,000   29,025,000 25,024,000
Net income (loss) 97,000 358,000   (23,000) 550,000
Old American
         
Segment Reporting Information [Line Items]          
Insurance revenues 18,791,000 18,230,000   37,338,000 36,319,000
Net investment income 2,806,000 2,959,000   5,726,000 5,869,000
Benefits and expenses 20,121,000 19,586,000   42,054,000 40,453,000
Net income (loss) 966,000 1,028,000   829,000 1,095,000
Intersegment Eliminations
         
Segment Reporting Information [Line Items]          
Insurance revenues (102,000) [2] (99,000) [2]   (203,000) [2] (197,000) [2]
Net investment income 0 [2] 0 [2]   0 [2] 0 [2]
Benefits and expenses (102,000) [2] (99,000) [2]   (203,000) [2] (197,000) [2]
Net income (loss) $ 0 [2] $ 0 [2]   $ 0 [2] $ 0 [2]
[1] During the third quarter of 2013, the Company identified an immaterial correction of an error in the presentation of net premiums and policyholder benefits that resulted from the incorrect recognition of premiums related to the conversion of fixed deferred annuity contracts to immediate annuities with life contingencies. The impact of the correction was an equal and offsetting increase to both premiums and policyholder benefits. The error resulted in no impact to net income, earnings per share, stockholders' equity, or cash flows. Related to the immaterial correction, the Company understated the presentation of net premiums and policyholder benefits by $15.7 million in the first quarter and $8.4 million in the second quarter of 2013. The numbers reported above have been corrected to reflect these adjustments.
[2] Elimination entries to remove intercompany transactions for life and accident and health insurance that the Company purchases for its employees and agents were as follows: insurance revenues from the Group Insurance segment and operating expenses from the Individual Insurance segment to arrive at Consolidated Statements of Comprehensive Income.